#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int n=10;
	double val=-1;
	double step=0.2;
	
	cout <<n <<"\n\n";
	
    for(int i=0;i<=n; ++i)
	{
	    //val=cos((2*double(i)+1)*(3.1415926535/(2*double(n)+2)));
	    cout <<val  <<"\n";
		//val= val+0.2;
		val= val+step;
	}

	return 0;
}
